Add configuration option to circumvent internal task creation (BSP-726)

[Maldus512]

This pull request implements the feature mentioned in #613. It adds a compile time configuration option that excludes task creation in lvgl_port_init. The API is hollowed out but otherwise left untouched to accommodate for other libraries that may in turn rely on lvgl_port like https://github.com/waveshareteam/Waveshare-ESP32-components.

[CLAassistant]

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[PetrESP]

Hello @Maldus512,

This is an interesting idea and I see that you've also created an issue.

But from what I can see is that you basically make it so calls to lvgl_init do nothing.

Have you considered not calling the lvgl_init in your application and then calling API lv_init(), lv_display_get_default() and the lv_indev logic in your own task? Like you would have to do if your option would not be set.

I think that there is no need for us to disable anything if you just don't call the init and do it yourself.

I hope this helps.